On Thu, 10 Feb 2011 05:51:06 -0500, shadowlink64 wrote:
> Our site is currently on a linux VPS with DreamHost and using nginx
> 0.8.53 as the web server and php-fcgi version 5.2.15. On occasion,
> our
> php-fastcgi processes just suddenly crash, and our users are left
> with a
> "502 Bad Gateway" error from nginx. The server is configured to use
> unix
> sockets and not a TCP port.
>

Everybody has that problem with PHP. The solution is to monitor PHP
with *something* (php-fpm, supervise, etc...)

I do it with supervise:
http://wiki.linuxwall.info/doku.php/en:ressources:dossiers:nginx:daemontools_spawnfcgi



Julien

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